| 基于汇水盆地法化探异常信息提取的综合应用
——以西昆仑赞坎地区1:5万水系沉积物地球化学测量为例 |
| 投稿时间：2024-04-16 修订日期：2024-08-06 点此下载全文 |
| 引用本文：郝延海.基于汇水盆地法化探异常信息提取的综合应用
——以西昆仑赞坎地区1:5万水系沉积物地球化学测量为例[J].地质与勘探,2025,61(1):100-110 |
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| 基金项目:新疆地质局喀什地区重要战略性矿产资源成矿规律研究与靶区优选（编号:XGMB202362） 资助 |
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| 中文摘要:地球化学测量是一种有效的找矿技术方法，基于汇水盆地的水系沉积物地球化学异常提取可以有效减少表生地球物理和地球化学作用造成的异常漂移，进而明确找矿方向。以西昆仑赞坎地区为研究区，使用高精度DEM划分汇水盆地，基于汇水盆地法对1：5万水系沉积物 Au、Cu、W、Mo因子得分进行了异常信息提取。以汇水盆地面积作为泥沙输移比校正残差值，在此基础上得到Au-Cu、W-Mo校正残差值分布图。与传统化探数据处理方法相比，基于汇水盆地法处理的水系沉积物异常范围明显变大，异常强度得到增强，异常的分布更符合研究区的地形特征。本次研究结果显示，利用该方法提取的高异常范围与研究区已知矿点匹配度高于传统处理方法，能够为该地区找矿工作提供依据。 |
| 中文关键词:汇水盆地 水系沉积物 地球化学特征 化探异常 赞坎地区 西昆仑 |
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| Comprehensive application of geochemical anomaly extraction based on the catchment basin method: An example of the 1: 50000 stream sediment measurements in the Zankan area of West Kunlun |
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| Abstract:Geochemical survey is an effective method for mineral prospecting. The extraction of geochemical anomalies from stream sediments based on the catchment basin method can effectively reduce anomaly drift caused by surficial geophysical and geochemical processes, which will aid to delineate prospecting targets. Taking the Zankan area in West Kunlun as an example, this work utilized high-resolution DEM data to delineate catchments, and applied the catchment basin method to extract anomaly information for Au, Cu, W, and Mo scores from 1:50,000 stream sediment measurements. The catchment area was used as a sediment transport ratio to correct residual values, and the corrected Au-Cu and W-Mo residual value distribution was obtained. Compared to traditional geochemical data processing methods, the catchment basin method obtained significantly larger anomaly ranges, enhanced anomaly intensities, and the obtained anomaly distribution was more consistent with the regional topographic characteristics. The study indicates that the high-anomaly areas in this study correspond better with the known mineral deposits in the study area compared to traditional methods, which will provide significant evidence for mineral prospecting in the region. |
| keywords:catchment basin, stream sediments, geochemical characteristics, geochemical anomalies, Zankan area, West Kunlun |
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